XML 112 R97.htm IDEA: XBRL DOCUMENT v3.8.0.1
Noncontrolling Interests (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Oct. 01, 2017
Jul. 31, 2017
Jan. 31, 2017
Jan. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Jul. 01, 2017
Jan. 01, 2017
Jan. 01, 2016
DaVinciRe Holdings Ltd.                  
Noncontrolling Interest [Line Items]                  
Redeemable noncontrolling interest, ownership percentage 22.10%       22.10% 24.00% 23.50% 22.60% 24.00%
Redeemable noncontrolling interest, net redemptions     $ 75,000 $ 100,000          
Redeemable noncontrolling interest, reserve holdback     7,500 $ 10,000          
Redeemable noncontrolling interest, sale of interest $ 49,700 $ 12,000 $ 24,000            
Non-voting preference shares issued to third parties $ 248,600                
Noncontrolling interest, value subscribed         $ 232,119 $ 43,040      
Redemption of shares from redeemable noncontrolling interests         $ 80,058 $ 98,285      
DaVinciRe Holdings Ltd. | Maximum                  
Noncontrolling Interest [Line Items]                  
Share repurchase requests, limit         25.00%        
DaVinciRe Holdings Ltd. | Redeemable Noncontrolling Interest                  
Noncontrolling Interest [Line Items]                  
Share repurchase requests, percent of aggregate shares, limit         50.00%        
RenaissanceRe Medici Fund Ltd.                  
Noncontrolling Interest [Line Items]                  
Redeemable noncontrolling interest, ownership percentage         26.80% 36.50%      
Written notice period for redemption         30 days        
Noncontrolling interest, value subscribed         $ 149,182 $ 79,518      
Redemption of shares from redeemable noncontrolling interests         $ 48,049 $ 21,729